选用N,N -二甲基乙酰胺作为反应溶剂后缩短反应时间的同时，得到的盖草能收率高，光学纯度好。
The n, N-dimethyl acetamide is used as the reaction solvent, therefore, the reaction time is shortened, and simultaneously, the obtained Gallant-Super has high yield rate and good optical purity.
覆膜处理虽在产量和水分利用效率上略高于盖草处理，但差异不显著，且覆膜处理存在成本高，污染土壤等缺陷。
There was no significant difference of rice grain yields between the treatments of straw mulching and plastic film covering but the cost and soil pollution in the latter should be concerned.
对有代表性的氯氰菊酯、 氯氟氰菊酯、精禾草克、精盖草能等手性农药及其中间体对映体的色谱分离方法进行了总结。
The chromatographic separation methods of the chiral pesticides and their intermediates, such as cypermethrin, cyfluthrin, quezalofop-p-ethyl, haloxyfop-p-methyl were summarized in this article.
于是每当雪球飞走,它都悄悄地叼一根造窝的草盖在“南瓜头”身上,每次就一根。
Then each time she left, he’d quietly place one piece of nesting straw over Punkinhead’s body. Just one.
墙壁是一块块密实的草捆，用竹针结合在一起，上面盖着渔网。
The walls are made of tightly packed straw bales held together with bamboo pins and covered with fishing nets.
因为他是个和尚，除了托钵以外，不知道还能怎么做，再加上他住在喜马拉雅山区，附近没有那么多牧草，所以他必须为他的牛托钵一些草，还得盖一间牛舍给它住。
And he lived in the part of the Himalayas with not much grass. He had to beg for straw and build a shelter for the cow.
是的，这是一所灌木丛学校- - -教室是由竹子建成的，房顶是用草盖的。
Well, it's a bush school-the classroom are made of bamboo and the roofs from grass.
是的，这是一所灌木丛学校---教室是由竹子建成的，房顶是用草盖的。
Well, it's a bush school—the classroom are made of bamboo and the roofs of grass.
这家有铅条窗户、草盖屋顶的小农舍美丽如画。
The tiny cottage with its leaded Windows and thatched roof was as pretty as a picture.
只是大山抱小山，大谷套小谷，而那些小山和小谷上，盖着一片连绵、丰茂的草和树。
With but slight exceptions the prospect is a broad rich mass of grass and trees, mantling minor hills and dales within the major .
综合分析认为，带状覆盖与敷盖措施是较好的侵蚀坡地果园生草方式，值得推广。
The comprehensive analysis showed that the way of strip covering and mulching was the best way in the eroded slope orchard and it was worth popularized.
树的高度、密度、胸径、森林下草的高度， 草的盖度与鸟类密度相关不显著。
However, The Mongolian pine height, density, DBH and the height and covering degree of grass under forest highly was not remarkable relevance with bird density, respectively.
利用野外移动式风洞试验装置，对永定河不同植被覆盖率河滩农地在不同风速下的风蚀量进行了测定，结果表明：播草盖沙可以提高起沙风速，有效减少河滩地的土壤流失。
It measures wind erosion under the conditions of different wind speed of floodplain area with different vegetation coverage ratio of the Yongding River by using mobile filed wind channel equipment.
开始，雪球四处张望，好像失去了方向，但她并没有试图揭开盖在“南瓜头”身上的草，而是飞到它惯用的栖木上呆在那儿。
At first Snowball seemed disoriented when she looked around, but she didn't try to uncover the chick. Instead, she flew up to her nor-mal perch and stayed there.
开始，雪球四处张望，好像失去了方向，但她并没有试图揭开盖在“南瓜头”身上的草，而是飞到它惯用的栖木上呆在那儿。
At first Snowball seemed disoriented when she looked around, but she didn't try to uncover the chick. Instead, she flew up to her normal perch and stayed there.
是的，这是一所灌木丛学校---教室是由竹子建成的，房顶是用草盖的。
Well, it's a bush school—the class room __________ bamboo and the roofs of grass.
是的，这是一所灌木丛学校---教室是由竹子建成的，房顶是用草盖的。
Well, it's a bush school—the class room __________ bamboo and the roofs of grass.
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